Southern and Thameslink trains are testing negative for Covid-19 after being treated with a long-lasting viruscide.
Operator Govia Thameslink Railway randomly selected carriages from train fleets up to 23 days after carriages were treated.
Swabs were taken from areas frequently touched by passengers and staff – including grab rails, tables, toilet handles and door buttons. Lab tests showed the surfaces were clear of Covid.
The long-lasting viruscide is part of a series of measures to keep passengers safe including 100 extra cleaning staff. All 2,700 carriages across Thameslink, Great Northern, Southern and Gatwick Express are also sanitised overnight using anti-viral sprays.